LG LC247HV Engineering Manual page 68

eleCtriCal ConneCtionS
Wiring connections
• Use only copper wiring that is strand-
ed, shielded with the wires separately
insulated.
• Power wiring and communications cable
sizes must comply with applicable feder-
al UL / ETL, state, and local codes.
• Install a ground wire for the outdoor unit
and indoor unit.
• Verify all wiring / cable connections are
appropriately tightened.
Connecting the Power Wiring / Communications Cable to the outdoor unit
LUU187HV, LUU247HV Outdoor Unit Connections
1. Remove the control cover from the unit by loosening the screws.
2. Take off the caps on the conduit panel.
3. Connect both the power supply and low voltage lines to the corre-
sponding terminals on the terminal block.
4. Be sure to ground the unit by following local codes.
5. Allow for enough length (add several inches) for each wiring.
6. Secure the cable with the cord clamp.
7. Secure conduit tubes with lock nuts.
8. Reattach the control cover with screws.
Figure 64: LUU187, 247HV Outdoor Unit Terminal Block Location.
Outdoor Unit Electrical Connection
Terminal block
Over 0.2"
Power supply
cord
Control cover
*Connection might look slightly di erent depending on Single
Zone ODU being used.
68 | Four-Way caSSette
Figure 63: Detailed Power / Communications System Schematic.
L N
Power Supply
Main Switch
Circuit Breaker
Power Wiring
(Including Ground)
Conduit panel
Connecting
cable
Due to our policy of continuous product innovation, some specifications may change without notification.
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G
L N
Fuse
LUU367HV, LUU427HV Outdoor Unit Connections
1. Remove the side panel.
2. Use the clamp to attach the wiring / cable.
Figure 65: LUU367, 427HV Outdoor Unit Terminal Block Location.
Insulation
Outdoor Unit
Terminal Block Outdoor Terminal Block Outdoor
1(L1) 2(L2) 1(L1) 2(L2) 3
Power
Wiring
1(L1) 2(L2) 3
Terminal Block Indoor
Indoor Unit
Main
Terminal
Block
Clamps
Clamp
When connecting the power wiring /
communication cables, make sure
the rubber bushing is properly inserted
in the access holes after removing the insulation.
Communication
Cable